1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/compound-assignment/left-hand-side-private-reference-data-property-sub.js b/js/src/tests/test262/language/expressions/compound-assignment/left-hand-side-private-reference-data-property-sub.js
new file mode 100644
index 0000000000..1d6d12de8c
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/compound-assignment/left-hand-side-private-reference-data-property-sub.js
@@ -0,0 +1,54 @@
+// This file was procedurally generated from the following sources:
+// - src/compound-assignment-private/sub.case
+// - src/compound-assignment-private/default/data-property.template
+/*---
+description: Compound subtraction assignment with target being a private reference (to a field)
+esid: sec-assignment-operators-runtime-semantics-evaluation
+features: [class-fields-private]
+flags: [generated]
+info: |
+    sec-assignment-operators-runtime-semantics-evaluation
+    AssignmentExpression : LeftHandSideExpression AssignmentOperator AssignmentExpression
+      1. Let _lref_ be the result of evaluating |LeftHandSideExpression|.
+      2. Let _lval_ be ? GetValue(_lref_).
+      ...
+      7. Let _r_ be ApplyStringOrNumericBinaryOperator(_lval_, _opText_, _rval_).
+      8. Perform ? PutValue(_lref_, _r_).
+      9. Return _r_.
+
+    sec-property-accessors-runtime-semantics-evaluation
+    MemberExpression : MemberExpression `.` PrivateIdentifier
+
+      1. Let _baseReference_ be the result of evaluating |MemberExpression|.
+      2. Let _baseValue_ be ? GetValue(_baseReference_).
+      3. Let _fieldNameString_ be the StringValue of |PrivateIdentifier|.
+      4. Return ! MakePrivateReference(_baseValue_, _fieldNameString_).
+
+    PutValue (V, W)
+      ...
+      5.b. If IsPrivateReference(_V_) is *true*, then
+        i. Return ? PrivateSet(_baseObj_, _V_.[[ReferencedName]], _W_).
+
+    PrivateSet (O, P, value)
+      ...
+      3. If _entry_.[[Kind]] is ~field~, then
+        a. Set _entry_.[[Value]] to _value_.
+
+---*/
+
+
+class C {
+  #field = 3;
+  compoundAssignment() {
+    return this.#field -= 2;
+  }
+  fieldValue() {
+    return this.#field;
+  }
+}
+
+const o = new C();
+assert.sameValue(o.compoundAssignment(), 1, "The expression should evaluate to the result");
+assert.sameValue(o.fieldValue(), 1, "PutValue should store the result in the private reference");
+
+reportCompare(0, 0);